Flush and mortise lock bolt for glass doors



June 25, 1946. E. L'. JONES FLUSH AND MORTISE LOCK BOLT FOR GLASS DOORS 3 Sheets-Sheet 1 Filed Aug. 22, 1944.

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} FLUSH AND MORTISE LOCK BOLT FOR GLASS DOORS Filed Aug. 22, 1944 3 SheetsSheet 2 Jig 3 I /8 INVENTOR. Elm erL James fi hwxfdm Patented June 25, 1946 OFFIQE FLUSH AND MORTISE LOCK BOLT FOR GLASS DOORS Elmer L. Jones, Seattle, Wash.

Application August 22, 1944, Serial No. 550,613

3 Claims. 1

This invention relates to door locks and particularly for looks for fastening glass doors.

In the increasing use of glass doors for houses and residences, stores, etc, difliculties are found in attempts to lock them, owing to their frangible character there is always danger that they may be broken when locks are attached to them; and when locks are so attached they detract from the artistic appearance of the doors and sales thereof are consequently reduced.

It is therefore among the objects of this invention to provide locks by which glass doors may be fastened, and the door be freed from the look when opened. A further object is to provide such a lock that may be permanently attached to the casing around any doorway, and to provide the lock with a bolt which may be folded outward and across the outside of a door for fastening the same which bolt may be so folded outward or folded back flush with the casing by the use of a suitable door key from outside the door or by a knob for manual use on the inside of the door.

With these and other objects to be hereinafter 7 stated I have illustratively exemplified my invention by the accompanying drawings of which:

Figure 1 shows a front elevation of the lock with a cover plate removed and the bolt withdrawn or folded inward. Figure 2 shows a cross section of Figure 1 taken on line 2-4 of Fig. 1. Figure 3 shows a front elevation similar to Fig, 1 but with the bolt extended for looking a door. Figure 4 shows a cross section of Fig. 3 taken on line 4-4 on Fig. 3. of the assembly, taken on line 5--5 on Fig. 1 with parts in section. Figure 6 shows a top plan of the lock in position in a door casing with the edge of the door between the bolt and the door jamb. Figure '7 is a front elevation of the lock in reduced size showing the cover in place and an aperture for the door key in an assembly when the lock is to be used in forward position,

Like characters on the different figures represent like parts. The letter A represents gener ally a lock casing in which most of the operative parts are enclosed, 13 represents a frame or front section of the casing in which the lock bolt is mounted. Numeral ll] represents a base plate or bottom of the casing for descriptive purposes so called, with upraised flanges numeral ll around it to provide a chamber for the movable parts. A cover plate I2 is normally connected over the flanges as by screws 13 which mesh in stud l4 and block I5 respectively. The front part or portion B is attached to A by rails l6 extended from B over the surface of A by screws ll binding the parts together, or A and B ma be integral.

The ends 18 of the frame project beyond the edges of the case and are flattened and provided with holes l8 through which screws l9 may be driven into any door casing indicated by C for attaching the lock thereto and maintaining the same in any suitable mortise 20. An auxiliary plate 2| is attached to the bottom plate ID as by rivets 21' or it may be integral therewith, and flanges 22 are extended upward from each side for supporting a cross pintle 22 upon which the lock bolt 23 is rotatably mounted within socket This bolt is substantially triangular in cross section with the pintle positioned through the upper rear corner 23'. Spaced below the p ntle is a wrist pin 24 on which the front end of a rocker arm 25 is pivotably mounted, so that when this arm is moved forward the upper front of the corner on the top side as 23" of the bolt is raised at right angles with the casing or case plate l0, and over and across the edge of any glass door as D for locking the same.

When the arm is drawn backward the bolt is again folded down with its front face 23 flush with the front face of frame B the door may Figure 5 is an end view be then freely opened or closed. In order to operate the arm the following mechanism is provided. A movable plate or carriage 26 is slidably mounted upon a boss l0 over the base Ill and is limited in travel by a pin 26' extended upward from the base through a slot 21 in the plate 26. A post 28 and a lug 29 affixed to the base further prevent lateral movement of the carriage. The rear end of the arm is connected by a pivot 30 to jaws 3| on the front of the carriage, whereby the arm is reciprocated when the carriage is moved. Curved jaws 32 and 32' are spaced apart and projected laterally from the rear end of the carriage which serve as fulcrums for a lever 33 to be operated for reciprocating the carriage and arm. This lever may be' of usual form on the inner end of a tumbler or key spool 34 to be turned by any suitable key as 34' from the outside of the door for looking or unlocking the bolt. The tumbler or key spool may be retained in suitable position with the lever for operation by set screw 35, extended back through holes 49 or 50 in the frame.

In order to prevent any undesired movement of the door bolt 23, a safety latch bar 36 is connected at its front end to the carriage by a screw or pivot 31 and carries an angular stop 38 projected laterally adjacent to the post 28. A flat H spring 39 is extended between the jaws 3| and the front end of the latch bar 36 which normally presses the latch bar 36 against the post 28, so that the stop 38 normally prevents longitudinal movement of the bar. The rear end of the latch bar carries a round headed lug 40, which is normally projected between the fulcrum jaws 32 and 32', so that when the lever is turned to move the fulcrums and the carriage, this lug is thereby depressed by the key backward against the tension of the spring 39, and the stop 38 is thereby released from thepost to permit the jaws and carriage to be moved by the lever when the key is turned. To assure prompt return of the latch bar against the post, an auxiliary retractive sprin 39 may be connected between the rear end of the bar and the carriage.

Independent means are provided for operating;

the look from the inside of the door. This comprises a knob 4i extended from the front end of posite the rear end of the latch bar alongthe surface of the case and below the plane of the latch bar and is there bent at right angles to provide a relatively short lever 44 for operating the latch bar and the bolt. The rear end of the latch bar is provided with spaced jaws 45 and 45' extended laterally toward the end of the lever to which they are pivotally connected by a pin or screw 46. The block I5 is affixed to the plate in and is provided with an aperture along its base as 41 to provide a journal bearing and fulcrum for the rod. In order to operate the bolt by the knob the operator turns the knob toward the right which causes the lever to move the latch bar laterally until the stop is freed from the post 28 and thereupon the rod and knob are pulled forward whereby the carriage is moved forward and the rocker arm then folds the bolt back into its bed 5| in the frame. In order to close the bolt over the door the knob is also turned to the right to release the stop from the post and the rod is then pushed inward whereby the arm causes the bolt to turn outward across the edge of the door for locking the same. It will be seen that the 4 is used it may be threaded into the seat 48 in the cover plate as seen in Figure 2, or when the lock is used in another position it may be threaded into .a similar seat as 48' in the base [0 as seen in Figure 1.

Having described my invention, I claim as new:

1. A door lock comprising a casing to be mortised in the door frame, a bolt pivotally supported in the casing and presenting a square locking edge to be movedbeyond the casing for locking function, a carriage pivotally connected to the bolt and operative to move the square face thereof beyond the casing for locking purposes or to move the square face flush with the opening in the casing to close the same, a latch pivoted on the carriage, a projection on the latch, a stop fixed in the casing in the path of the latch projection to prevent movement of the carriage when the latch is in operative position, a manually operable rod extending through the casing and beyond. the same for manual operation, said rod being rotatablymounted in the casing and having a terminal fixed to the latch to move the latch in the operation of the rod to raise the latch to free its projection from the stop to permit locking operating movement of the carriage to project and withdraw the bolt, said rod being longitudinally movable at will to operate the carriage and thereby the bolt in either direction.

2. A construction as defined in claiml wherein the bolt includes a single integral member having a square face on one side to present a locking abutment to overlie the door, the bolt being pivoted in the casing at one end of and adjacent the square face and a connection between the carriage and bolt for operatingthe latter, said connection and the pivotal mounting between the casing and the bolt being on a plane at an inclination to the square face of the bolt to assist in holding the square face of the bolt stop on the bar while on either side of the post.

prevents the longitudinal movement of the bar in either direction until it has been freed or withdrawn from the post by the rod.

Where a key tumbler assembly indicated as 34 against casual movement.

3. A construction as defined-in claim l where in the latch is provided with an offset lug and wherein the carriage is provided with spaced jaws between which the lug rides in the operation of the latch, and wherein a key operated locking element is mounted in the casing and operable 

